I took my '09 E92 (7000 miles) to Cobb SoCal for a custom tune. My goal was to get more power than the daily driver map on ACN 91, as the OTS Stage 1 Sport maps have been shown to be too aggressive for ACN 91. My only pertinent mod was an AA Sport FMIC (car also had Dinan CAI, Forge DVs, and PE, but didn't consider those game changers).

I should mention that I'm not planning on installing downpipes or running meth, E85, etc. I'm just interested in safely improving on the stock configuration with my current mods and ACN 91. One question I have, however, is do you guys agree with the tuner in running AFR richer for the custom tune? Does that help with temp/efficiency/power when turning up the boost?